[RE-wrenches] Damaged PV module cells

[Jerry Shafer]

Kent
I can assume there is no backsheet external damage, These look cell
fractures, more common on poly, they may be cause of manufacturing or a
result of overheating traces or both. Run an IR Curve test and see if this
is resulting in decreased output. Sharp had a similar issue when they
stepped up to the 200 larger modules some 20 years ago.
Fun times

On Sun, Jul 16, 2023, 2:59 PM Kent via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Found some damage to a customer's Grape CS-S-180-DJ PV modules this
> morning. Unlike anything I've ever seen; so I'm hoping that someone on this
> list can tell me the cause. I've put several photos of the cells online
> <https://drive.google.com/drive/folders/1nQhTqahEx4whmmWyy89tqaEEGvzkvEps?usp=sharing>
> so you can inspect them. While it looks like there has been some localized
> heating on the traces, there isn't any evidence of damage on the rear of
> the PV modules. These are on an off grid system charging some 12-volt
> batteries. Thanks.
>
> Kent Osterberg
> Blue Mountain Solar
> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20230716/e77d2f42/attachment.htm>